Sound-box for talking-machines.



No.855,786. 4 PATENTEDV JUNELL, 1907.

L. P. VALIQUET.

SOUND BOX FOR TALKINGMAGHINES. APPLICATION FILED JAN. 12, 1904.

WITNESSES: INVENTOR loxi\s .\$cx\\guei By I m A TTOIINEY.

- T0 (12/: whom it may concernrinrrnn erases rarer enrich Louis? vaiieunr, or NEW YORK, N. Y., ASSIGNOR TO THE VICTOR .TALKING ltiACHINECOMPANY, A CORPORATION or NEW roan.-

scene-sex Foe TaLKiNle-macHiNEs.

Be it known that I, Lou s P. VALi UieT, a citizen of the United States,and a resident of the city of New York, State of New York,

have invented certain new and useful Improvements in Sound-Boxes forTalking- Machines, of which the following is a full, clear, and completedisclosure. The object of my invention is to; provid such a constructionin sound boxes that the stylus bar may be adjusted and formed so as tohave the correct characteristics of-elas ticity, shape and size inrelation to the dia phragni.

A further object of my invention is to provide such a stylus bar thatthe tendency to lateral movement of its end where it connects with thediaphragm is entirely obviated and the sound waves therebydischarge atin. more exactly perpendicular direction upon the diaphragm of the soundbox.

' Briefly, .my invention consists in providing a stylus bar, the end ofwhich is bent inwardly to form the connection between the end of thestylus bar and the diaphragm, the parts being integral and capable ofbeing filedor reduced so as to vary theirsize, shape and elasticity.

For a full, clear-and exact description of my invention reference may behad to the accompanying specification and to the accompanying drawingforming part thereof,

in which I a Figure 1 s a Vertical sectional view of a sound box, saidsection being taken substantially on a plane passing through the axis ofthe stylus bar; .l ig. 2,'a front elevation of the sound box; Fig. 3, aside view'of the sound box on the side thereof through which the stylusbar projects, and Fig. 1, an elevation of the stylus bar detached fromthe sound box.

Referring to the drawing, the numeral 1 in- I dicates the cylindricalcasing of the sound in position.

box, and 2 the sound tube thereof. The interior of the casing is formedwith the usual flange or seat 3 for holding the diaphragm 4 The usualgaskets or other suitable matcrial are placed each side of the diaphragmas indicated at.5 and 6 A ring 7v referably of metal and slightlyelastic is ibrced'against the outer gasket 6 to hold the diaphragm inposition. openingS is provided in the cylindrical portion of the casingSpecification of Letters Patent. Application filed January 12,1904.serial -188 806.

, Patented June 4:, 190% screws 10 for olding the fulcrum'and stylus barin position.

The stylus bar 11 corisists'ol a tapering piece of steel or othersuitable material having the usual recess 12 in its lower endfor'eceiving the st lus or needle 13. The lower end of the sai stylus bar11 is provided with an enlarged ortion in the nature of a flange againstwhic the sup orting spring yoke or fulcrum 15' is seated passes thethumb-screw 16 for retaining the needle 13 Within the end of the stylus.bar. The inner reduced end' of the stylus bar 11 is curved slightlyoutward and then inwardat right an es to the axis of said stylus bar asindicated at 17. The inner end of the rightangled portion is providedwith enlarged head 18" which'is secured against the dia-. phragm 4 bymeans of wax or other suitable material, as indicated at 19. The curvedportion 17 of thest lus bar-l1 is preferably of small radius an of theshape shown in Figs. 1 and 4, the shape shown being that most convenientfor the adjustment and same in relation to diaphragms of difierenpeculiarities and characteristics.

. 5 and through which It is well known in the manufacture of,thicknesses which materially affects the quality and volume of thesound produced. A thick diaphragm would of course require a stylus barof less elasticity, of more rigidity, and of heavier weight than would adie.-

phragm of a less thickness." It is therefore necessary to balance thestylus bar tocorrespend to the thickness of a particular diaphragm. Thisbalancing may be easily accomplished in the present form ofiny-invention by scraping or filing away the material about the curveand the portions adjacent ity and rigidity so that the said character:istics may be exactly and acchratelypro advantages of havingtheinner endoffthe stylus bar reduced and purged as described? the stylus bar ismade resilientioraportion .thereto, of the stylus bar. This not onlyreduces the weight of the stylus bar at them point of the curvebut alsovaries its elasticduced to correspond with the diaphragg which has beeninserted. Inaddition 'to" the treatment of the stylus bar for balancingthe 5 phragm. This does away with any tendency of its length whichallows the vibrations transmission to the diaphragm. This causes thesound produced by the diaphragm to be much softened and the harsh-andundesirable vibrations are, therefore, eliminated.

The curve'17, in combination with the outward bend of the'stylus barproper, aifords amuch longer connection between the stylus bar and thediaphragm, thereby obviating the tendency of the diaphragm to be movedtransversely, owing to the fact that the end of the stylus barvibratesor'oscillates in the arc of a circle. This longer connectionalso allows. the part at right angles to the diaphragm to be madestiffer without sacrificing any features of theresiliency thereof.

By having the fulcrum spring or yoke located as shown in the drawings,that is, substantially in the plan of the axis of the stylus bar and by,providing the inner end of the stylus bar. with the shape shown, theoscillations of the stylus bar are made at almost exactly right anglesto the plane of the diaof the end of the stylus bar to move laterstylusbar from the diaphragm.

ally in the plane of the diaphragm, which in some instances with heavyvibrations is sufficient to loosenthe connecting portion of the Ido notwish to be limited to the exact details of form and arrangement of partsherein set forth for the same may be varied, to produce the functionsand results set forth, ina degree commensurate with the claimshereinafter made.

Having thus described my invention, what I claim and desire to protectby Letters Patent of the United States, is

' 1. In a sound box for talking machines, the combination of adiaphragmand a stylus bar having a double 'or reversed curve and having its innerend broughtinto operative relation with said diaphragm.

' 2.'In a sound box for talking machines, the combination with adiaphragm, of a stylus bar gradually tapered toward its inner end, andhaving a double or reversed curve, said inner end being adapted to beconnected to the diaphragm.

3. In a sound box for talking machines, a stylus bar which isgraduallytapered toward its inner end, said end being curved outwardlyon an arc of comparatively large radius and then curved inwardly on anarc of comparatively small radius to connect with the diaphragm on aline at substantially right angles to the plane thereof.

4. In a. sound box for talking machines, the combination of a diaphragmand a stylus bar which is reduced in diameter toward its inner end, saidreduced portion being bent out of the direct line first away from andthen toward the-point where it is connected with the diaphragm toincrease its length in relation to thelength of the radius of the 7sound box.

5. In a sound box for talking machines, a stylus bar having a reducedinner end, said end being curved outwardly, and then inwardly to beattached to said diaphragm and .to form a resilient or yieldingconnection therefor.

'6. In a sound box for talking machines, a

stylus bar having agradually reduced inner end which is adapted to beattached to the diaphragm, said end being curved outwardly, and theninwardly in a direction substantially at right angles to the axis of'thestylus bar to form a resilient connection.

7. In a sound box for talking machines, a stylus bar having a taperinginner end, said inner end being bent outwardly, and then inwardly in acurve of small radius to connect with the diaphragmto form a resilientconnection therewith.

8. In a sound box for talking machines, a

stylus bar which is tapered toward its inner end, said end being bentoutwardly and then curved inwardly to connect with the diahra m and toform a resilient connection P e therewith. I

9. In a sound box for talking machines, a stylus bar having an integralflange thereon, a fulcrum for said stylus bar comprising a torsionspring having a central collar held frictional y in position against thesaid flange. v

on the stylus bar, said spring having annular ends adapted to beattached to the sound box casing.

10. In a sound box for talking machines, a

stylus bar having an integral flange, afu-lcrum for said stylus barcomprising a torsion spring having portions substantially in the planeof the axis of said stylus bar having a then toward said diaphragm, theinner end of said stylus bar being adjacent said diaphragm. y

13. In a sound box for talking machines the combination of a diaphragmand a stylus bar, said stylus bar having its inner end inclined'outwardly away from the diaphra and then turned inwardly to be attacheto said diaphragm, to form a resilient or yielding connection therefor.

14. Ina sound box, a stylus bar having its inner extremity bentoutwardly on a curve of relatively large radius and bent inwardly Inwitness whereof I have hereunto set my on a C1:1[1'VB of relativelysmalllradius; d hand this 8th day of January, A. D. 19041 15. n a sounbox, a sty us a1" tapere toward its inner extremity, the said stylusLOUIS VALIQUET" 5 bar being bent outwardly on a curve of rela-Witnesses: tively large radius and being bent inwardly FRANK G.SWARTWOUT,

on a curve of relatively small radius. JOSEPH M. ZAREMBA;

